I have long wanted to swim around the inner reef at Little Henty Reef in the Marengo Reefs Marine Sanctuary. The reefs are not far offshore from Hayley Point at Marengo. The weather and sea conditions here are unsuitable most of the time for such a swim. However, the weather and ocean omens were pointing strongly to early Monday 29 June being a good time to go – and indeed it was. A large high pressure system had parked over the state and stayed for a few days. Monday dawned with the ocean in repose, a cloudless sky and not a breath of wind – cold winter perfection.
The 12 hectares of protected ocean in the sanctuary contain two reefs, and a rich profusion of marine life including a colony of 100 or so Australian fur seals on the outer reef. The protected area is about 750m long and 200m wide. Its southern and eastern areas are subject to big surf and strong currents as they are fully exposed to huge swells from the Southern Ocean. The north-western portion of the sanctuary is more protected, and the smaller reef there semi-encloses a little bay inside Hayley Point. I have swum in this bay a lot with my swimming friends, but there are nearly always tidal currents and often strong rips immediately to the north in Mounts Bay. In big swell the shore break in Mounts Bay can also be something to contend with. There are many days when even the little bay is not suitable for swimming.
The image above of the Garmin swim track superimposed on a satellite photo of Little Henty reef (not representative of actual sea conditions on the day of the swim, but showing the mix of waves and currents the place can produce) shows the route swum yesterday. The right turn across the reef back into the little bay was at the southern end of the exposed rock of the reef on the half tide. It was shallow where we crossed the reef at the southern end, and we had large bull kelp fronds brushing our wetsuits as the sea gently surged against the edge of the reef.
The swim around Little Henty Reef on 29 June 2020
L to R: me, Mike. Eastern side of the inner reef. Photo taken by Nadine Lyford.
Swimming past the prolific bull kelp areas on the eastern side of the reef. Photo below taken by Nadine Lyford.
Back in the little bay.
Image on the right: bumped into swimming friends Michelle and Vicki who were also enjoying the winter perfection at Marengo on one of their regular morning swims in the bay. Some of my Apollo Bay swimming friends recently did a swim around the inner reef at Little Henty, and enjoyed it greatly.
This was neither a long nor a fast swim. But it was a memorable ocean swim. What a pleasure and privilege to swim in this pristine and wild corner of the Southern Ocean.